Finding the Fourth Proportional to 2,151.32, 2,968.65 and 1,207.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.32 : 2,968.65 = 1,207.15 : x
2. Step 2: Convert to fraction form
   2,151.32/2,968.65 = 1,207.15/x
3. Step 3: Cross multiply
   2,151.32x = 2,968.65 × 1,207.15
4. Step 4: Simplify right side
   2,151.32x = 3,583,598.43
5. Step 5: Solve for x
   x = 3,583,598.43/2,151.32
6. Step 6: Final answer
   x = 1,665.77